Connect Gas Sensor With Bluetooth Using Arduino Mega 2560

Introduction

In this article, I will explain about connecting the Gas Sensor to the Bluetooth.
When the gas is leaked, it can automatically send the message to the app.
We can control the gas leakage in the house.

Parts Of Lists

Connection

Step 1

Connection from Arduino Board to the Bluetooth.

Step 2

Connection from Arduino Board to the Sensor.

Programming

const int AOUTpin = 0; //the AOUT pin of the CO sensor goes into analog pin A0 of the arduino
const int DOUTpin = 8; //the DOUT pin of the CO sensor goes into digital pin D8 of the arduino
const int ledPin = 13; //the anode of the LED connects to digital pin D13 of the arduino
int limit;
int value;
void setup()
{
Serial.begin(9600);
//sets the baud rate pinMode(DOUTpin, INPUT);
//sets the pin as an input to the arduino pinMode(ledPin, OUTPUT);
//sets the pin as an output of the arduino
}
void loop()
{
value = analogRead(AOUTpin); //reads the analaog value from the CO sensor's AOUT pin
limit = digitalRead(DOUTpin); //reads the digital value from the CO sensor's DOUT pin
Serial.print("CO value: ");
Serial.println(value); //prints the CO value
Serial.print("Limit: ");
Serial.print(limit); //prints the limit reached as either LOW or HIGH (above or underneath)
delay(100);
if (limit == HIGH)
{
Serial.println("Bad");
}
else
{
Serial.println("OK");
}
}